visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2023-07-11 11:00 
일시 July 11th(Tue), 11:00AM 
장소 E6-2, #1323 
연사 Dr. Mingxuan Fu (University of Tokyo) 
물리학과에서는 아래와 같이 세미나를 개최하고자 하오니 관심있는 분들의 많은 참석 부탁드립니다.
 
Date: 11:00 Am, 11th July (Tue)
 
Place: E6-2, #1323
 
Speaker: Dr. Mingxuan Fu(University of Tokyo)
 
Title: Ordered phases, non-Fermi liquid, and quantum criticality driven by entanglement between multipoles and conduction electrons
 
Abstract: 

Electrons' charge, spin, orbital degrees of freedom, and phonons constitute the fundamental building blocks of correlated quantum matters. The complex interplay among them renders exotic emergent phenomena that push the boundaries of our knowledge about the quantum world. Though earlier studies essentially focus on the role of spin in generating quantum phases and fluctuations, designing novel quantum phases with alternative ingredients other than spin may inspire a new conceptual framework for understanding confounding quantum phenomena in strongly correlated electron systems [1-3]. 

Entanglement between multipolar moments and conduction electrons paves a new route to extend the landscape of novel quantum phenomena beyond the spin-only paradigm. A model platform for exploring multipolar physics is the cubic heavy-fermion system PrTr2Al20 (Tr = Ti, V). This system features a nonmagnetic ground state in which the magnetic dipolar moment (spin) is absent, but higher-rank multipolar moments (quadrupoles and octupoles) are active [4]. The entanglement of these local multipolar moments with conduction electrons results in a rich phase diagram comprising multipolar orders, non-Fermi liquid (NFL) phase, and exotic superconductivity [4-6]. In this talk, I will present our experimental investigation into the multipolar ordered phases and magnetic-field-induced quantum critical behavior in PrV2Al20 via a combination of electrical transport, thermodynamics, and lattice probes, which shows that the evolution of ordered phases, non-Fermi liquid behavior, and Fermi surface across the multipolar quantum critical regime drastically differs from that in the familiar magnetic setting.

 

References

[1] S. Paschen and Q. Si, Nat. Rev. Phys. 3, 9-26 (2021)

[2] P.W. Phillips, N.E. Hussey, and P. Abbamonte, Science 377, (2022)

[3] A. E. Böhmer, J-H Chu, S. Lederer and M. Yi, Nat. Phys. 18, 1412-1419 (2022)

[4] A. Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. 80, 063701 (2011)

[5] K. Matsubayashi et al., Phys. Rev. Letts. 109, 187004 (2012)

[6] Y. Shimura et al Phys. Rev. B. 91, 241102(R)

번호 날짜 장소 제목
526 2009-02-23 16:00  E6, 1501  Physics Colloquium : 2009 Spring file
525 2009-09-07 16:00  E6, 1501  Physics Colloquium : 2009 Fall file
524 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
523 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
522 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
521 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
520 2011-05-16 16:00  E6, 1501  Photonics with surface plasmon polaritons
519 2011-09-03 16:00  E6, 1501  Physics Colloquium : 2011 Fall file
518 2012-02-13 16:00  E6, 1501  Physics Colloquium : 2012 Spring
517 2012-04-02 16:00  E6, 1501  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
516 2013-03-11 16:00  E6, 1501  Physics Colloquium : 2013 Spring
515 2013-09-09 16:00  E6, 1501  Physics Colloquium : 2013 Fall
514 2014-03-10 16:00  E6, 1501  Physics Colloquium : 2014 Spring file
513 2014-05-28 17:00  KI Building, Matrix Hall  부품소재산업이 미래다
512 2014-12-22 14:00  E6, Rm1319  Dynamics of molecular motors: Power stroke vs Brownian ratchet file
511 2015-03-04 12:00  1323호, E6-2  Bioimaging and Biosensing Using Near-Infrared Fluorescence file
510 2015-03-09 16:00  E6, 1501  Physics Colloquium : 2015 Spring file
509 2015-03-13 14:00  Connect Room, KI Bldg.  The 15th Innovative Workshop on Soft/Bio Materials file
508 2015-06-03 12:00  Room 101, E11  The First Wednesday Multidisciplinary Forum file
507 2015-07-15 14:00  E6-2,1323  Electronic and optical properties of titanate-based oxide superlattices